This updated technical paper compiles information on the mitigation and sustainable development benefits of actions, initiatives and options to enhance mitigation ambition identified in the submissions by Parties and accredited observer organizations submitted to the secretariat under workstream 2 of the Ad Hoc Working Group on the Durban Platform for Enhanced Action on pre-2020 ambition. This technical paper comprises three separate documents: the main text, contained in document FCCC/TP/2013/8, and two addenda, contained in documents FCCC/TP/2013/8/Add.1, and FCCC/TP/2013/8/Add.2. The main findings on the mitigation benefits of actions, initiatives and options to enhance mitigation ambition, found in the main text, are complemented by an overview table on thematic areas with high mitigation potential, benefits, barriers, examples of national policies and information on cooperative initiatives. The addenda substantiate the main findings with more detailed information